All this is useful but the most important thing is giving no whiff of coming to Canada for work.It's understandable to want to be prepared for questioning by customs agents and provide them with a reasonable explanation for your frequent visits to Canada. While it's not common to encounter hostile agents, it's helpful to have a well-thought-out reason for your visits.
Exploring different areas each time can be a valid explanation, as it shows your curiosity for Canadian culture and various attractions. This approach allows you to express your interest in experiencing different parts of the country, including Montreal and Toronto. You can mention specific places you have previously visited and express your desire to continue exploring Canada's diversity.
Becoming a member at a specific cultural venue, like Place des Arts, is also a good idea if you can find one that offers memberships. It provides legitimacy to your frequent visits and gives you something concrete to mention when questioned. If Place des Arts doesn't offer memberships, you can search for other cultural venues in Montreal or Toronto that do. Alternatively, you can mention attending events or exhibitions at various cultural venues during your visits.Maybe you could indicate that you are fans of Montréal canadian and that you are interested in attending a hockey game. However, ensure you are aware of the team's schedule and if they will be playing at their home arena. In case they ask important questions such as who your favorite player is or if you can name a couple of hockey players, make sure you know a few names. The same strategy applies if you are visiting Toronto; you can mention that you are a fan of the Toronto Maple Leafs. This would be an excellent choice.
While encountering a hostile customs agent is rare, it's always prudent to be prepared and have a well-thought-out explanation for your visits. By emphasizing your growing interest in Canadian culture, tourism, or specific attractions, and providing specific examples or mentioning memberships at cultural venues or you are a hockey fan, you can demonstrate a genuine reason for your frequent visits.
If they ask you must say “absolutely not”, it must be true and seem true!